We design the atom chip system. This system includes ultra-high system, atom chip, current controller and helmholtz coils etc. All the system introduce in the chapter three and four. The goal of this system will using laser cooling and surface magneto-optical trap to capture Rubidium and Cesium cold atoms. We also need to find the best condition to the magnetic trap. Changing the gradient of magnetic to let these two cold atoms collide or overlap. We will also use the phase shifting interferometry to detect the atoms.